CRITICAL 9.1 Microsoft
CVE-2026-4177
YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter
Microsoft Security Update 2026-Mar: YAML::Syck versions through 1.36 for Perl has several potential security vulnerabilities including a high-severity heap buffer overflow in the YAML emitter
Affected Products
- azl3 perl-YAML 1.30-2 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4177
- https://nvd.nist.gov/vuln/detail/CVE-2026-4177
This critical severity vulnerability with a CVSS score of 9.1 was published on 2026-03-10 via Microsoft. Affected: azl3 perl-YAML 1.30-2 on Azure Linux 3.0.
Risk Timeline
CVE Disclosed2026-03-10 · 224 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-4177NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2026-4177Related Vulnerabilities
| CVE | Title | Severity | CVSS |
|---|---|---|---|
| CVE-2025-32433 PoC | Erlang/OTP SSH Vulnerable to Pre-Authentication RCE | CRITICAL | 10.0 |
| CVE-2026-39821 | Invoking failure to reject ASCII-only Punycode-encoded labels in golang.org/x/ne | CRITICAL | 10.0 |
| CVE-2026-42960 | Possible cache poisoning via promiscuous records for the authority section | CRITICAL | 10.0 |
| CVE-2026-46595 | Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x | CRITICAL | 10.0 |
| CVE-2025-62168 PoC | Squid vulnerable to information disclosure via authentication credential leakage | CRITICAL | 10.0 |
| CVE-2026-44210 | Kata Containers have VM Escape via virtiofsd Argument Injection through Default- | CRITICAL | 9.9 |
vulnfeed aggregates 17594 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.